B3 Pro 10W Compact 2S-3S LiPo Balance Charger

The B3 Pro is a compact mains-powered balance charger for 2S and 3S LiPo packs, the size used in small drones, RC planes and cars. It plugs straight into a 100–240 V AC socket and charges through the pack's balance lead, so no separate power supply or charge lead is needed.

Key features

• Separate 2S and 3S balance ports
• Up to 800 mA per cell channel (3 × 800 mA), about 10 W
• LED status: orange at power-on, green on standby and when full, red while charging
• Light, compact body with a 0.5 m mains cable for the field bag

Specifications

• Input: 100–240 V AC
• Cells: 2S–3S
• Chemistry: LiPo only
• Charge current: 800 mA per cell (3 × 800 mA)
• Power: 10 W
• Dimensions: 95 × 55 × 32 mm
• Weight: 160 g
• Cable length: 0.5 m

At 800 mA it suits small packs: a 1000 mAh 3S pack takes a little over an hour from flat, while a 2200 mAh pack needs close to three hours, so use a larger balance charger for big packs or anything above 3S. It is rated for LiPo only; do not use it on LiHV or LiFe packs.